perf probe: Provide perf interface for uprobes

- Enhances perf to probe user space executables and libraries.
- Enhances -F/--funcs option of "perf probe" to list possible probe points in
  an executable file or library.
- Documents userspace probing support in perf.

[ Probing a function in the executable using function name  ]
perf probe -x /bin/zsh zfree

[ Probing a library function using function name ]
perf probe -x /lib64/libc.so.6 malloc

[ list probe-able functions in an executable ]
perf probe -F -x /bin/zsh

[ list probe-able functions in an library]
perf probe -F -x /lib/libc.so.6

Signed-off-by: Srikar Dronamraju <srikar@linux.vnet.ibm.com>
Cc: Ananth N Mavinakayanahalli <ananth@in.ibm.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Anton Arapov <anton@redhat.com>
Cc: Christoph Hellwig <hch@infradead.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Jim Keniston <jkenisto@linux.vnet.ibm.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Linux-mm <linux-mm@kvack.org>
Cc: Masami Hiramatsu <masami.hiramatsu.pt@hitachi.com>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20120416120909.30661.99781.sendpatchset@srdronam.in.ibm.com
Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>

6 files changed, 403 insertions, 98 deletions

diff --git a/tools/perf/Documentation/perf-probe.txt b/tools/perf/Documentation/perf-probe.txt
index 2780d9ce48bf..fb673bef4798 100644
--- a/tools/perf/Documentation/perf-probe.txt
+++ b/tools/perf/Documentation/perf-probe.txt
@@ -77,7 +77,8 @@ OPTIONS
 
 -F::
 --funcs::
-        Show available functions in given module or kernel.
+        Show available functions in given module or kernel. With -x/--exec,
+        can also list functions in a user space executable / shared library.
 
 --filter=FILTER::
         (Only for --vars and --funcs) Set filter. FILTER is a combination of glob
@@ -98,6 +99,11 @@ OPTIONS
 --max-probes::
         Set the maximum number of probe points for an event. Default is 128.
 
+-x::
+--exec=PATH::
+        Specify path to the executable or shared library file for user
+        space tracing. Can also be used with --funcs option.
+
 PROBE SYNTAX
 ------------
 Probe points are defined by following syntax.
@@ -182,6 +188,13 @@ Delete all probes on schedule().
 
  ./perf probe --del='schedule*'
 
+Add probes at zfree() function on /bin/zsh
+
+ ./perf probe -x /bin/zsh zfree
+
+Add probes at malloc() function on libc
+
+ ./perf probe -x /lib/libc.so.6 malloc
 
 SEE ALSO
 --------
diff --git a/tools/perf/builtin-probe.c b/tools/perf/builtin-probe.c
index 4935c09dd5b5..ee3d84a7c895 100644
--- a/tools/perf/builtin-probe.c
+++ b/tools/perf/builtin-probe.c
@@ -54,6 +54,7 @@ static struct {
         bool show_ext_vars;
         bool show_funcs;
         bool mod_events;
+        bool uprobes;
         int nevents;
         struct perf_probe_event events[MAX_PROBES];
         struct strlist *dellist;
@@ -75,6 +76,8 @@ static int parse_probe_event(const char *str)
                 return -1;
         }
 
+        pev->uprobes = params.uprobes;
+
         /* Parse a perf-probe command into event */
         ret = parse_perf_probe_command(str, pev);
         pr_debug("%d arguments\n", pev->nargs);
@@ -125,6 +128,28 @@ static int opt_del_probe_event(const struct option *opt __used,
         return 0;
 }
 
+static int opt_set_target(const struct option *opt, const char *str,
+                        int unset __used)
+{
+        int ret = -ENOENT;
+
+        if  (str && !params.target) {
+                if (!strcmp(opt->long_name, "exec"))
+                        params.uprobes = true;
+#ifdef DWARF_SUPPORT
+                else if (!strcmp(opt->long_name, "module"))
+                        params.uprobes = false;
+#endif
+                else
+                        return ret;
+
+                params.target = str;
+                ret = 0;
+        }
+
+        return ret;
+}
+
 #ifdef DWARF_SUPPORT
 static int opt_show_lines(const struct option *opt __used,
                           const char *str, int unset __used)
@@ -246,9 +271,9 @@ static const struct option options[] = {
                    "file", "vmlinux pathname"),
         OPT_STRING('s', "source", &symbol_conf.source_prefix,
                    "directory", "path to kernel source"),
-        OPT_STRING('m', "module", &params.target,
-                   "modname|path",
-                   "target module name (for online) or path (for offline)"),
+        OPT_CALLBACK('m', "module", NULL, "modname|path",
+                "target module name (for online) or path (for offline)",
+                opt_set_target),
 #endif
         OPT__DRY_RUN(&probe_event_dry_run),
         OPT_INTEGER('\0', "max-probes", &params.max_probe_points,
@@ -260,6 +285,8 @@ static const struct option options[] = {
                      "\t\t\t(default: \"" DEFAULT_VAR_FILTER "\" for --vars,\n"
                      "\t\t\t \"" DEFAULT_FUNC_FILTER "\" for --funcs)",
                      opt_set_filter),
+        OPT_CALLBACK('x', "exec", NULL, "executable|path",
+                        "target executable name or path", opt_set_target),
         OPT_END()
 };
 
@@ -310,6 +337,10 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
                         pr_err("  Error: Don't use --list with --funcs.\n");
                         usage_with_options(probe_usage, options);
                 }
+                if (params.uprobes) {
+                        pr_warning("  Error: Don't use --list with --exec.\n");
+                        usage_with_options(probe_usage, options);
+                }
                 ret = show_perf_probe_events();
                 if (ret < 0)
                         pr_err("  Error: Failed to show event list. (%d)\n",
@@ -333,8 +364,8 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
                 if (!params.filter)
                         params.filter = strfilter__new(DEFAULT_FUNC_FILTER,
                                                        NULL);
-                ret = show_available_funcs(params.target,
-                                           params.filter);
+                ret = show_available_funcs(params.target, params.filter,
+                                        params.uprobes);
                 strfilter__delete(params.filter);
                 if (ret < 0)
                         pr_err("  Error: Failed to show functions."
@@ -343,7 +374,7 @@ int cmd_probe(int argc, const char **argv, const char *prefix __used)
         }
 
 #ifdef DWARF_SUPPORT
-        if (params.show_lines) {
+        if (params.show_lines && !params.uprobes) {
                 if (params.mod_events) {
                         pr_err("  Error: Don't use --line with"
                                " --add/--del.\n");
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 8a8ee64e72d1..59dccc98b554 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -44,6 +44,7 @@
 #include "trace-event.h"        /* For __unused */
 #include "probe-event.h"
 #include "probe-finder.h"
+#include "session.h"
 
 #define MAX_CMDLEN 256
 #define MAX_PROBE_ARGS 128
@@ -70,6 +71,8 @@ static int e_snprintf(char *str, size_t size, const char *format, ...)
 }
 
 static char *synthesize_perf_probe_point(struct perf_probe_point *pp);
+static int convert_name_to_addr(struct perf_probe_event *pev,
+                                const char *exec);
 static struct machine machine;
 
 /* Initialize symbol maps and path of vmlinux/modules */
@@ -170,6 +173,34 @@ const char *kernel_get_module_path(const char *module)
         return (dso) ? dso->long_name : NULL;
 }
 
+static int init_user_exec(void)
+{
+        int ret = 0;
+
+        symbol_conf.try_vmlinux_path = false;
+        symbol_conf.sort_by_name = true;
+        ret = symbol__init();
+
+        if (ret < 0)
+                pr_debug("Failed to init symbol map.\n");
+
+        return ret;
+}
+
+static int convert_to_perf_probe_point(struct probe_trace_point *tp,
+                                        struct perf_probe_point *pp)
+{
+        pp->function = strdup(tp->symbol);
+
+        if (pp->function == NULL)
+                return -ENOMEM;
+
+        pp->offset = tp->offset;
+        pp->retprobe = tp->retprobe;
+
+        return 0;
+}
+
 #ifdef DWARF_SUPPORT
 /* Open new debuginfo of given module */
 static struct debuginfo *open_debuginfo(const char *module)
@@ -224,10 +255,7 @@ static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp,
         if (ret <= 0) {
                 pr_debug("Failed to find corresponding probes from "
                          "debuginfo. Use kprobe event information.\n");
-                pp->function = strdup(tp->symbol);
-                if (pp->function == NULL)
-                        return -ENOMEM;
-                pp->offset = tp->offset;
+                return convert_to_perf_probe_point(tp, pp);
         }
         pp->retprobe = tp->retprobe;
 
@@ -275,9 +303,20 @@ static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
                                           int max_tevs, const char *target)
 {
         bool need_dwarf = perf_probe_event_need_dwarf(pev);
-        struct debuginfo *dinfo = open_debuginfo(target);
+        struct debuginfo *dinfo;
         int ntevs, ret = 0;
 
+        if (pev->uprobes) {
+                if (need_dwarf) {
+                        pr_warning("Debuginfo-analysis is not yet supported"
+                                        " with -x/--exec option.\n");
+                        return -ENOSYS;
+                }
+                return convert_name_to_addr(pev, target);
+        }
+
+        dinfo = open_debuginfo(target);
+
         if (!dinfo) {
                 if (need_dwarf) {
                         pr_warning("Failed to open debuginfo file.\n");
@@ -603,23 +642,22 @@ static int kprobe_convert_to_perf_probe(struct probe_trace_point *tp,
                 pr_err("Failed to find symbol %s in kernel.\n", tp->symbol);
                 return -ENOENT;
         }
-        pp->function = strdup(tp->symbol);
-        if (pp->function == NULL)
-                return -ENOMEM;
-        pp->offset = tp->offset;
-        pp->retprobe = tp->retprobe;
 
-        return 0;
+        return convert_to_perf_probe_point(tp, pp);
 }
 
 static int try_to_find_probe_trace_events(struct perf_probe_event *pev,
                                 struct probe_trace_event **tevs __unused,
-                                int max_tevs __unused, const char *mod __unused)
+                                int max_tevs __unused, const char *target)
 {
         if (perf_probe_event_need_dwarf(pev)) {
                 pr_warning("Debuginfo-analysis is not supported.\n");
                 return -ENOSYS;
         }
+
+        if (pev->uprobes)
+                return convert_name_to_addr(pev, target);
+
         return 0;
 }
 
@@ -1341,11 +1379,18 @@ char *synthesize_probe_trace_command(struct probe_trace_event *tev)
         if (buf == NULL)
                 return NULL;
 
-        len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s%s%s+%lu",
-                         tp->retprobe ? 'r' : 'p',
-                         tev->group, tev->event,
-                         tp->module ?: "", tp->module ? ":" : "",
-                         tp->symbol, tp->offset);
+        if (tev->uprobes)
+                len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s:%s",
+                                 tp->retprobe ? 'r' : 'p',
+                                 tev->group, tev->event,
+                                 tp->module, tp->symbol);
+        else
+                len = e_snprintf(buf, MAX_CMDLEN, "%c:%s/%s %s%s%s+%lu",
+                                 tp->retprobe ? 'r' : 'p',
+                                 tev->group, tev->event,
+                                 tp->module ?: "", tp->module ? ":" : "",
+                                 tp->symbol, tp->offset);
+
         if (len <= 0)
                 goto error;
 
@@ -1364,7 +1409,7 @@ error:
 }
 
 static int convert_to_perf_probe_event(struct probe_trace_event *tev,
-                                       struct perf_probe_event *pev)
+                               struct perf_probe_event *pev, bool is_kprobe)
 {
         char buf[64] = "";
         int i, ret;
@@ -1376,7 +1421,11 @@ static int convert_to_perf_probe_event(struct probe_trace_event *tev,
                 return -ENOMEM;
 
         /* Convert trace_point to probe_point */
-        ret = kprobe_convert_to_perf_probe(&tev->point, &pev->point);
+        if (is_kprobe)
+                ret = kprobe_convert_to_perf_probe(&tev->point, &pev->point);
+        else
+                ret = convert_to_perf_probe_point(&tev->point, &pev->point);
+
         if (ret < 0)
                 return ret;
 
@@ -1472,7 +1521,26 @@ static void clear_probe_trace_event(struct probe_trace_event *tev)
         memset(tev, 0, sizeof(*tev));
 }
 
-static int open_kprobe_events(bool readwrite)
+static void print_warn_msg(const char *file, bool is_kprobe)
+{
+
+        if (errno == ENOENT) {
+                const char *config;
+
+                if (!is_kprobe)
+                        config = "CONFIG_UPROBE_EVENTS";
+                else
+                        config = "CONFIG_KPROBE_EVENTS";
+
+                pr_warning("%s file does not exist - please rebuild kernel"
+                                " with %s.\n", file, config);
+        } else
+                pr_warning("Failed to open %s file: %s\n", file,
+                                strerror(errno));
+}
+
+static int open_probe_events(const char *trace_file, bool readwrite,
+                                bool is_kprobe)
 {
         char buf[PATH_MAX];
         const char *__debugfs;
@@ -1484,27 +1552,31 @@ static int open_kprobe_events(bool readwrite)
                 return -ENOENT;
         }
 
-        ret = e_snprintf(buf, PATH_MAX, "%stracing/kprobe_events", __debugfs);
+        ret = e_snprintf(buf, PATH_MAX, "%s/%s", __debugfs, trace_file);
         if (ret >= 0) {
                 pr_debug("Opening %s write=%d\n", buf, readwrite);
                 if (readwrite && !probe_event_dry_run)
                         ret = open(buf, O_RDWR, O_APPEND);
                 else
                         ret = open(buf, O_RDONLY, 0);
-        }
 
-        if (ret < 0) {
-                if (errno == ENOENT)
-                        pr_warning("kprobe_events file does not exist - please"
-                                 " rebuild kernel with CONFIG_KPROBE_EVENT.\n");
-                else
-                        pr_warning("Failed to open kprobe_events file: %s\n",
-                                   strerror(errno));
+                if (ret < 0)
+                        print_warn_msg(buf, is_kprobe);
         }
         return ret;
 }
 
-/* Get raw string list of current kprobe_events */
+static int open_kprobe_events(bool readwrite)
+{
+        return open_probe_events("tracing/kprobe_events", readwrite, true);
+}
+
+static int open_uprobe_events(bool readwrite)
+{
+        return open_probe_events("tracing/uprobe_events", readwrite, false);
+}
+
+/* Get raw string list of current kprobe_events  or uprobe_events */
 static struct strlist *get_probe_trace_command_rawlist(int fd)
 {
         int ret, idx;
@@ -1569,36 +1641,26 @@ static int show_perf_probe_event(struct perf_probe_event *pev)
         return ret;
 }
 
-/* List up current perf-probe events */
-int show_perf_probe_events(void)
+static int __show_perf_probe_events(int fd, bool is_kprobe)
 {
-        int fd, ret;
+        int ret = 0;
         struct probe_trace_event tev;
         struct perf_probe_event pev;
         struct strlist *rawlist;
         struct str_node *ent;
 
-        setup_pager();
-        ret = init_vmlinux();
-        if (ret < 0)
-                return ret;
-
         memset(&tev, 0, sizeof(tev));
         memset(&pev, 0, sizeof(pev));
 
-        fd = open_kprobe_events(false);
-        if (fd < 0)
-                return fd;
-
         rawlist = get_probe_trace_command_rawlist(fd);
-        close(fd);
         if (!rawlist)
                 return -ENOENT;
 
         strlist__for_each(ent, rawlist) {
                 ret = parse_probe_trace_command(ent->s, &tev);
                 if (ret >= 0) {
-                        ret = convert_to_perf_probe_event(&tev, &pev);
+                        ret = convert_to_perf_probe_event(&tev, &pev,
+                                                                is_kprobe);
                         if (ret >= 0)
                                 ret = show_perf_probe_event(&pev);
                 }
@@ -1612,6 +1674,33 @@ int show_perf_probe_events(void)
         return ret;
 }
 
+/* List up current perf-probe events */
+int show_perf_probe_events(void)
+{
+        int fd, ret;
+
+        setup_pager();
+        fd = open_kprobe_events(false);
+
+        if (fd < 0)
+                return fd;
+
+        ret = init_vmlinux();
+        if (ret < 0)
+                return ret;
+
+        ret = __show_perf_probe_events(fd, true);
+        close(fd);
+
+        fd = open_uprobe_events(false);
+        if (fd >= 0) {
+                ret = __show_perf_probe_events(fd, false);
+                close(fd);
+        }
+
+        return ret;
+}
+
 /* Get current perf-probe event names */
 static struct strlist *get_probe_trace_event_names(int fd, bool include_group)
 {
@@ -1717,7 +1806,11 @@ static int __add_probe_trace_events(struct perf_probe_event *pev,
         const char *event, *group;
         struct strlist *namelist;
 
-        fd = open_kprobe_events(true);
+        if (pev->uprobes)
+                fd = open_uprobe_events(true);
+        else
+                fd = open_kprobe_events(true);
+
         if (fd < 0)
                 return fd;
         /* Get current event names */
@@ -1829,6 +1922,8 @@ static int convert_to_probe_trace_events(struct perf_probe_event *pev,
         tev->point.offset = pev->point.offset;
         tev->point.retprobe = pev->point.retprobe;
         tev->nargs = pev->nargs;
+        tev->uprobes = pev->uprobes;
+
         if (tev->nargs) {
                 tev->args = zalloc(sizeof(struct probe_trace_arg)
                                    * tev->nargs);
@@ -1859,6 +1954,9 @@ static int convert_to_probe_trace_events(struct perf_probe_event *pev,
                 }
         }
 
+        if (pev->uprobes)
+                return 1;
+
         /* Currently just checking function name from symbol map */
         sym = __find_kernel_function_by_name(tev->point.symbol, NULL);
         if (!sym) {
@@ -1894,12 +1992,18 @@ int add_perf_probe_events(struct perf_probe_event *pevs, int npevs,
         int i, j, ret;
         struct __event_package *pkgs;
 
+        ret = 0;
         pkgs = zalloc(sizeof(struct __event_package) * npevs);
+
         if (pkgs == NULL)
                 return -ENOMEM;
 
-        /* Init vmlinux path */
-        ret = init_vmlinux();
+        if (!pevs->uprobes)
+                /* Init vmlinux path */
+                ret = init_vmlinux();
+        else
+                ret = init_user_exec();
+
         if (ret < 0) {
                 free(pkgs);
                 return ret;
@@ -1971,23 +2075,15 @@ error:
         return ret;
 }
 
-static int del_trace_probe_event(int fd, const char *group,
-                                  const char *event, struct strlist *namelist)
+static int del_trace_probe_event(int fd, const char *buf,
+                                                  struct strlist *namelist)
 {
-        char buf[128];
         struct str_node *ent, *n;
-        int found = 0, ret = 0;
-
-        ret = e_snprintf(buf, 128, "%s:%s", group, event);
-        if (ret < 0) {
-                pr_err("Failed to copy event.\n");
-                return ret;
-        }
+        int ret = -1;
 
         if (strpbrk(buf, "*?")) { /* Glob-exp */
                 strlist__for_each_safe(ent, n, namelist)
                         if (strglobmatch(ent->s, buf)) {
-                                found++;
                                 ret = __del_trace_probe_event(fd, ent);
                                 if (ret < 0)
                                         break;
@@ -1996,40 +2092,43 @@ static int del_trace_probe_event(int fd, const char *group,
         } else {
                 ent = strlist__find(namelist, buf);
                 if (ent) {
-                        found++;
                         ret = __del_trace_probe_event(fd, ent);
                         if (ret >= 0)
                                 strlist__remove(namelist, ent);
                 }
         }
-        if (found == 0 && ret >= 0)
-                pr_info("Info: Event \"%s\" does not exist.\n", buf);
 
         return ret;
 }
 
 int del_perf_probe_events(struct strlist *dellist)
 {
-        int fd, ret = 0;
+        int ret = -1, ufd = -1, kfd = -1;
+        char buf[128];
         const char *group, *event;
         char *p, *str;
         struct str_node *ent;
-        struct strlist *namelist;
-
-        fd = open_kprobe_events(true);
-        if (fd < 0)
-                return fd;
+        struct strlist *namelist = NULL, *unamelist = NULL;
 
         /* Get current event names */
-        namelist = get_probe_trace_event_names(fd, true);
-        if (namelist == NULL)
-                return -EINVAL;
+        kfd = open_kprobe_events(true);
+        if (kfd < 0)
+                return kfd;
+
+        namelist = get_probe_trace_event_names(kfd, true);
+        ufd = open_uprobe_events(true);
+
+        if (ufd >= 0)
+                unamelist = get_probe_trace_event_names(ufd, true);
+
+        if (namelist == NULL && unamelist == NULL)
+                goto error;
 
         strlist__for_each(ent, dellist) {
                 str = strdup(ent->s);
                 if (str == NULL) {
                         ret = -ENOMEM;
-                        break;
+                        goto error;
                 }
                 pr_debug("Parsing: %s\n", str);
                 p = strchr(str, ':');
@@ -2041,17 +2140,46 @@ int del_perf_probe_events(struct strlist *dellist)
                         group = "*";
                         event = str;
                 }
+
+                ret = e_snprintf(buf, 128, "%s:%s", group, event);
+                if (ret < 0) {
+                        pr_err("Failed to copy event.");
+                        free(str);
+                        goto error;
+                }
+
                 pr_debug("Group: %s, Event: %s\n", group, event);
-                ret = del_trace_probe_event(fd, group, event, namelist);
+
+                if (namelist)
+                        ret = del_trace_probe_event(kfd, buf, namelist);
+
+                if (unamelist && ret != 0)
+                        ret = del_trace_probe_event(ufd, buf, unamelist);
+
+                if (ret != 0)
+                        pr_info("Info: Event \"%s\" does not exist.\n", buf);
+
                 free(str);
-                if (ret < 0)
-                        break;
         }
-        strlist__delete(namelist);
-        close(fd);
+
+error:
+        if (kfd >= 0) {
+                if (namelist)
+                        strlist__delete(namelist);
+
+                close(kfd);
+        }
+
+        if (ufd >= 0) {
+                if (unamelist)
+                        strlist__delete(unamelist);
+
+                close(ufd);
+        }
 
         return ret;
 }
+
 /* TODO: don't use a global variable for filter ... */
 static struct strfilter *available_func_filter;
 
@@ -2068,30 +2196,152 @@ static int filter_available_functions(struct map *map __unused,
         return 1;
 }
 
-int show_available_funcs(const char *target, struct strfilter *_filter)
+static int __show_available_funcs(struct map *map)
+{
+        if (map__load(map, filter_available_functions)) {
+                pr_err("Failed to load map.\n");
+                return -EINVAL;
+        }
+        if (!dso__sorted_by_name(map->dso, map->type))
+                dso__sort_by_name(map->dso, map->type);
+
+        dso__fprintf_symbols_by_name(map->dso, map->type, stdout);
+        return 0;
+}
+
+static int available_kernel_funcs(const char *module)
 {
         struct map *map;
         int ret;
 
-        setup_pager();
-
         ret = init_vmlinux();
         if (ret < 0)
                 return ret;
 
-        map = kernel_get_module_map(target);
+        map = kernel_get_module_map(module);
         if (!map) {
-                pr_err("Failed to find %s map.\n", (target) ? : "kernel");
+                pr_err("Failed to find %s map.\n", (module) ? : "kernel");
                 return -EINVAL;
         }
+        return __show_available_funcs(map);
+}
+
+static int available_user_funcs(const char *target)
+{
+        struct map *map;
+        int ret;
+
+        ret = init_user_exec();
+        if (ret < 0)
+                return ret;
+
+        map = dso__new_map(target);
+        ret = __show_available_funcs(map);
+        dso__delete(map->dso);
+        map__delete(map);
+        return ret;
+}
+
+int show_available_funcs(const char *target, struct strfilter *_filter,
+                                        bool user)
+{
+        setup_pager();
         available_func_filter = _filter;
+
+        if (!user)
+                return available_kernel_funcs(target);
+
+        return available_user_funcs(target);
+}
+
+/*
+ * uprobe_events only accepts address:
+ * Convert function and any offset to address
+ */
+static int convert_name_to_addr(struct perf_probe_event *pev, const char *exec)
+{
+        struct perf_probe_point *pp = &pev->point;
+        struct symbol *sym;
+        struct map *map = NULL;
+        char *function = NULL, *name = NULL;
+        int ret = -EINVAL;
+        unsigned long long vaddr = 0;
+
+        if (!pp->function) {
+                pr_warning("No function specified for uprobes");
+                goto out;
+        }
+
+        function = strdup(pp->function);
+        if (!function) {
+                pr_warning("Failed to allocate memory by strdup.\n");
+                ret = -ENOMEM;
+                goto out;
+        }
+
+        name = realpath(exec, NULL);
+        if (!name) {
+                pr_warning("Cannot find realpath for %s.\n", exec);
+                goto out;
+        }
+        map = dso__new_map(name);
+        if (!map) {
+                pr_warning("Cannot find appropriate DSO for %s.\n", exec);
+                goto out;
+        }
+        available_func_filter = strfilter__new(function, NULL);
         if (map__load(map, filter_available_functions)) {
                 pr_err("Failed to load map.\n");
-                return -EINVAL;
+                goto out;
         }
-        if (!dso__sorted_by_name(map->dso, map->type))
-                dso__sort_by_name(map->dso, map->type);
 
-        dso__fprintf_symbols_by_name(map->dso, map->type, stdout);
-        return 0;
+        sym = map__find_symbol_by_name(map, function, NULL);
+        if (!sym) {
+                pr_warning("Cannot find %s in DSO %s\n", function, exec);
+                goto out;
+        }
+
+        if (map->start > sym->start)
+                vaddr = map->start;
+        vaddr += sym->start + pp->offset + map->pgoff;
+        pp->offset = 0;
+
+        if (!pev->event) {
+                pev->event = function;
+                function = NULL;
+        }
+        if (!pev->group) {
+                char *ptr1, *ptr2;
+
+                pev->group = zalloc(sizeof(char *) * 64);
+                ptr1 = strdup(basename(exec));
+                if (ptr1) {
+                        ptr2 = strpbrk(ptr1, "-._");
+                        if (ptr2)
+                                *ptr2 = '\0';
+                        e_snprintf(pev->group, 64, "%s_%s", PERFPROBE_GROUP,
+                                        ptr1);
+                        free(ptr1);
+                }
+        }
+        free(pp->function);
+        pp->function = zalloc(sizeof(char *) * MAX_PROBE_ARGS);
+        if (!pp->function) {
+                ret = -ENOMEM;
+                pr_warning("Failed to allocate memory by zalloc.\n");
+                goto out;
+        }
+        e_snprintf(pp->function, MAX_PROBE_ARGS, "0x%llx", vaddr);
+        ret = 0;
+
+out:
+        if (map) {
+                dso__delete(map->dso);
+                map__delete(map);
+        }
+        if (function)
+                free(function);
+        if (name)
+                free(name);
+        return ret;
 }
diff --git a/tools/perf/util/probe-event.h b/tools/perf/util/probe-event.h
index a7dee835f49c..f9f3de8b4220 100644
--- a/tools/perf/util/probe-event.h
+++ b/tools/perf/util/probe-event.h
@@ -7,7 +7,7 @@
 
 extern bool probe_event_dry_run;
 
-/* kprobe-tracer tracing point */
+/* kprobe-tracer and uprobe-tracer tracing point */
 struct probe_trace_point {
         char            *symbol;        /* Base symbol */
         char            *module;        /* Module name */
@@ -21,7 +21,7 @@ struct probe_trace_arg_ref {
         long                            offset; /* Offset value */
 };
 
-/* kprobe-tracer tracing argument */
+/* kprobe-tracer and uprobe-tracer tracing argument */
 struct probe_trace_arg {
         char                            *name;  /* Argument name */
         char                            *value; /* Base value */
@@ -29,12 +29,13 @@ struct probe_trace_arg {
         struct probe_trace_arg_ref      *ref;   /* Referencing offset */
 };
 
-/* kprobe-tracer tracing event (point + arg) */
+/* kprobe-tracer and uprobe-tracer tracing event (point + arg) */
 struct probe_trace_event {
         char                            *event; /* Event name */
         char                            *group; /* Group name */
         struct probe_trace_point        point;  /* Trace point */
         int                             nargs;  /* Number of args */
+        bool                            uprobes;        /* uprobes only */
         struct probe_trace_arg          *args;  /* Arguments */
 };
 
@@ -70,6 +71,7 @@ struct perf_probe_event {
         char                    *group; /* Group name */
         struct perf_probe_point point;  /* Probe point */
         int                     nargs;  /* Number of arguments */
+        bool                    uprobes;
         struct perf_probe_arg   *args;  /* Arguments */
 };
 
@@ -129,8 +131,8 @@ extern int show_line_range(struct line_range *lr, const char *module);
 extern int show_available_vars(struct perf_probe_event *pevs, int npevs,
                                int max_probe_points, const char *module,
                                struct strfilter *filter, bool externs);
-extern int show_available_funcs(const char *module, struct strfilter *filter);
-
+extern int show_available_funcs(const char *module, struct strfilter *filter,
+                                bool user);
 
 /* Maximum index number of event-name postfix */
 #define MAX_EVENT_INDEX 1024
diff --git a/tools/perf/util/symbol.c b/tools/perf/util/symbol.c
index c0a028c3ebaf..caaf75ad645a 100644
--- a/tools/perf/util/symbol.c
+++ b/tools/perf/util/symbol.c
@@ -2784,3 +2784,11 @@ int machine__load_vmlinux_path(struct machine *machine, enum map_type type,
 
         return ret;
 }
+
+struct map *dso__new_map(const char *name)
+{
+        struct dso *dso = dso__new(name);
+        struct map *map = map__new2(0, dso, MAP__FUNCTION);
+
+        return map;
+}
diff --git a/tools/perf/util/symbol.h b/tools/perf/util/symbol.h
index 1f003884f1ab..5649d63798cb 100644
--- a/tools/perf/util/symbol.h
+++ b/tools/perf/util/symbol.h
@@ -242,6 +242,7 @@ void dso__set_long_name(struct dso *dso, char *name);
 void dso__set_build_id(struct dso *dso, void *build_id);
 void dso__read_running_kernel_build_id(struct dso *dso,
                                        struct machine *machine);
+struct map *dso__new_map(const char *name);
 struct symbol *dso__find_symbol(struct dso *dso, enum map_type type,
                                 u64 addr);
 struct symbol *dso__find_symbol_by_name(struct dso *dso, enum map_type type,